Geothermal Heat Recovery Complex: Large-Scale, Deep Direct-Use System in a Low-Temperature Sedimentary Basin (Final Report)
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- Univ. of Illinois at Urbana-Champaign, IL (United States)
- University of Illinois at Urbana-Champaign
- US Army Construction Engineering Research Laboratory, Champaign, IL (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
- Univ. of Wisconsin, Madison, WI (United States)
- Trimeric Corporation, Buda, TX (United States)
- Andrews, Hammock & Powell, Inc., Macon, GA (United States)
- Loudon Technical Services, LLC
- Salas-O'brien (MEP Associates, LLC), Atlanta, GA (United States)
A feasibility study of using deep direct-use (DDU) geothermal energy to heat agricultural research facilities (ARFs) was conducted at the University of Illinois at Urbana-Champaign (U of IL) and its similar application to military facilities in the Illinois Basin (ILB). The geothermal energy system (GES) investigated utilizes low-temperature (30–90°C; 90–190°F) geothermal fluid (i.e., brine) from an extraction well that is part of a deep, two-well (doublet) system that extends to the bottom of the ILB. The geothermal reservoir modeled, the Mt. Simon Sandstone (MSS), is about 1,280 m (4,200 feet) deep and 457 m thick (1,500 feet) beneath the U of IL. The DDU GES surface infrastructure includes heat exchangers connected in-parallel to pipelines carrying the geothermal fluid and fresh cold and hot water. Analysis of the GES indicated that the MSS can provide a baseload of 2 MMBtu/hr to heat the ARFs by extracting 954 m³/d (6,000 barrels/day [bbl/d]) of geothermal fluid that has a temperature of 44–46 °C (111–115 °F). In addition to analyzing the levelized cost of heat (LCOH) and life cycle costs, the environmental effects of the DDU GES were evaluated, including reduced greenhouse gas (GHG) emissions and water consumption. Multiple system designs were evaluated and then ranked based on their maximum heating performance, energy efficiency, and cost recovery. This feasibility study identified the key components of the fully-integrated DDU technology that can be implemented, both technically and economically. The results and information from this study provides end-users and policy makers with guidance for additional research on the specific components of DDU technology such that its widespread use can provide an uninterruptible energy source, increase resilience from extreme weather conditions, reduce U.S. dependency on fossil fuels, and reduce greenhouse gas (GHG) emissions. The site-specific part of this study gives U of IL administrators a realistic and pragmatic assessment of the financial resources necessary to add a DDU GES in the MSS to the campus’ energy portfolio.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Geothermal Technologies Office
- DOE Contract Number:
- EE0008106
- OSTI ID:
- 1821557
- Report Number(s):
- DOE-UIUC-8106
- Resource Relation:
- Related Information: Stumpf AJ et al 2020. Feasibility of deep direct-use for district-scale applications in a low-temperature sedimentary basin. Proceedings of 45th Workshop on Geothermal Reservoir Engineering Stanford, CA. https://pangea.stanford.edu/ERE/pdf/IGAstandard/SGW/2020/Stumpf.pdf.Thomas, L.K., Tinjum, J.M., and Holcomb, F.H., 2020. Environmental Life Cycle Assessment of a Deep Direct-use Geothermal System in Champaign, Illinois, Proceedings, Forty-Fifth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, CA, https://doi.org/10.15121/1601452.Stumpf, A., Damico, J., Okwen, R., Stark, T., Elrick, S., Nelson, W.J., Lu, Y., Holcomb, F., Tinjum, J., Yang, F., Frailey, S., & Lin, YF., 2018. Feasibility of a Deep Direct-Use Geothermal System at the University of Illinois at Urbana-Champaign. Geothermal Resources Council Transactions, 42: 227-248, https://www.osti.gov/servlets/purl/1462352.Okwen, R., Yang, F., Lin, Z., Lin, J., & Stark, T., 2020. Assessment of Geothermal Energy Extraction from the Mt. Simon Sandstone at University of Illinois at Urbana-Champaign Using a Doublet Well System, Proceedings, Forty-Fifth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, CA, https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2020/Okwen.pdf.
- Country of Publication:
- United States
- Language:
- English
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